Handles wire sized from No. 18 to No. 8 AWG copper. Silicone-based sealant protects against moisture and corrosion. Easy-to-apply pre-filled twist-on wire connectors. Live-action, square-wire spring, no pre-twisting required. Minimum of 2 No. 18 AWG, maximum of 2 No. 10 AWG. UL (Underwriter's Laboratories) listed to 486D for use with direct burial. 10 per card.